A shocking list of reasons for cars failing an MOT has been revealed and 70,000 motorists failed for the craziest reasons.

Scrap Car Comparison put together the list of fully preventable reasons for failing an MOT tests.

Reasons for vehicles failing their MOT include poor hygiene, dirty number plates and MOT tester’s being unable to unstick a satnav sucker from the window.

Of course, there are a few MOT failures more common than others - tyre tread depth falling below the 1.6mm limit, worn out brake pads falling to less than 1.5mm thickness and poorly aimed headlamps.

Some vehicles failed the MOT because testers were unable to unstick the satnav from the window

But a whopping 2,416 people found themselves in the embarrassing situation of having a ‘Refusal to MOT’ because their vehicles have been so dirty and non-accessible to allow an MOT to even take place, the Birmingham Mail reports.

Alarmingly, many vehicles are also getting a ‘refusal to MOT’ because of environmental health grounds.

The hygiene of some vehicles has been so poor with UK motors left full of fast food leftovers, cartons and cans of drink.

Some drivers have even risked their own health by growing mould on the interior and windows.

And many MOT stations up and down the country see vehicles, and especially 4x4s pull up covered in mud and although they get registered in, the MOT test will be a ‘refusal’ – avoiding the failure stage.

The second biggest failure conducted by Scrap Car Comparison from their network of MOT testing stations was a lack of windscreen washer fluid.

2,416 people were refused an MOT service because their vehicle was so dirty

Over 1,624 drivers of UK vehicles failed on such a simple maintenance task that would have avoided a retest.

The third highest number of crazy failures was those with registration plate issues.

An astonishing 1,422 of the most ridiculous fails included those with dirty number plates, wrong coloured plates or illegal fonts.

And amazingly 126 people put their car in for an MOT with a missing registration plate.

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A spokesperson for scrapcarcomparison.co.uk said: "It’s amazing how many drivers fail before they even set foot in the testing centres.

“Dirty number plates, warning lights these can easily be given attention and many of the problems are basic maintenance. Poor car hygiene is a common factor and can also lead to health issues.”

“Other reasons of failure that didn’t make the list included car boots inaccessible by being full of sporting equipment or rubbish and the failure of a driver and an MOT tester to unstick a satnav sucker from a window obscuring a drivers view."